Littleton homeowners can call 303-287-1846 or use request service online to have Cool Sunshine Heating & Air Conditioning install, repair, or maintain an air conditioner, heat pump, furnace, ductless system, or zone control setup. A technician comes to the house, checks the equipment, and explains the options before any work is scheduled.
We are a family-owned and operated company, in business since October 1996. Whether the air conditioner quit in the first heat wave or you are planning a replacement before the next season, we start with the equipment already in your home.
In Business Since 1996 | BBB Accredited, A+ Rating | 4.8 Stars from 209+ Google Reviews
Air Conditioner Installation & Replacement
A new central air conditioner begins with measuring what the house needs: room sizes, sun exposure, insulation, and the condition of the ductwork and the indoor air handler. Cool Sunshine Heating & Air Conditioning installs and replaces central air conditioning systems, and we size each one to the home rather than copying the capacity of the unit being removed.
A house near Historic Downtown Littleton may have additions, modified ducts, or equipment that has been patched over the years, so the right replacement differs from one address to the next. We lay out the equipment options and the work each one involves, and we tell you when repairing the system you have is still the better choice.
Air Conditioning Repair & Service
An air conditioner that blows warm air, cycles on and off, leaks water, trips a safety switch, or makes new noises should be diagnosed before anyone brings up a new unit. We repair central air conditioners and their indoor air handlers, find the fault, and explain what the fix involves.
If your air conditioner in the Sterne Park area has failed in the same way for more than one summer, ask for a repair estimate and a replacement estimate together. Seeing both makes it easier to judge whether one more repair is worth the money.
HVAC Maintenance & AC Tune-Ups
A tune-up is a planned visit in which a technician inspects and cleans the equipment, so worn parts and small faults come to light before a breakdown. Our maintenance plans cover the air conditioner ahead of summer and the furnace or heat pump ahead of winter, and the visit is a good time to ask about air filters, since a dirty filter is a common cause of weak airflow.
Homeowners around Bega Park who have not had their system looked at in a while can begin with whichever season is closest. The technician reports what needs attention and what can wait, which leaves you free to plan repairs on your schedule.
Heat Pump Installation, Repair & Service
A heat pump heats and cools from a single system, so the work includes installing a new unit, replacing an older one, repairing a heat pump that has lost capacity or stopped, and servicing it each year. We handle all of it, beginning with a look at the home’s equipment, ductwork, and comfort complaints before we recommend heat pumps.
For a Littleton winter, the main questions are how the heat pump will perform on the coldest days and whether to keep a furnace as backup. We explain how a heat pump alone, a heat pump paired with a gas furnace, and a furnace with an air conditioner would each run in your house, so you can compare them side by side.
Furnace Repair & Installation
A furnace that will not ignite, blows cold air, cycles rapidly, or makes unusual noises should be inspected promptly. Our technicians repair, replace, and install gas furnaces. You hear which part failed and what fixing it costs, which lets you compare a repair with a new furnace.
Homeowners near Ketring Park with a furnace that keeps needing repairs can ask for both prices at once. Littleton sits at roughly 5,400 feet, so it is also worth asking how a new furnace will be set up for the elevation.
Ductless Mini Split Installation & Repair
Mini splits move heating and cooling into a single room or zone with no ducts involved, a fit for additions, finished basements, garage conversions, and any house lacking a duct system. Our technicians size and mount the indoor and outdoor units, fix mini splits that are already installed, and keep them serviced afterward. With ductless systems, each space runs on its own settings.
A mini split that has stopped cooling, is leaking, or has not been cleaned in years can be inspected the same way. We find out whether it needs a repair, a cleaning, or a replacement part, and tell you what each would involve.
Zone Control System Installation & Repair
A zone control system divides a home into areas that each have a thermostat and a motorized damper, so every area can follow its own schedule. Zoning can be added to ducts that are already in the house, and we also repair and service the dampers and controls of existing systems. When a replacement is planned, zone control systems can be part of the job if the floor plan supports them.
A bedroom wing that never matches the living area, or a finished basement that stays cold, are common reasons to ask about zoning. After a look at the ducts and the floor plan, we tell you which makes more sense: zoning, new duct work, or a mini split.
Indoor Air Quality Systems & Whole-Home Humidity
Better air in the house often comes from equipment tied into the existing heating and cooling system: stronger filters, purifiers, fresh-air ventilation, and humidifiers or dehumidifiers that serve every room. Once we know what is installed today, we can suggest indoor air quality products that match it.
Dry winter air, lingering dust, and stale rooms are the usual complaints. Each add-on gets its own price, so you decide which ones earn a place in the house.
Why Littleton Homeowners Choose Us
Heating and cooling equipment stays in a house for years, so each visit begins with what you own now and ends with options you can compare. We explain what the technician found, put repair and replacement next to each other, and leave the choice to you.
Cool Sunshine is run by a family. BBB Accreditation goes back to 1999. The BBB profile names Joy Valentine as President and General Manager, with Perry Valentine as Owner and Manager. Our office address is 4395 Oneida Street, Denver, CO 80216.
Air Conditioner, Heat Pump, and Furnace Questions Before You Replace
What affects the cost of a new air conditioner in Littleton?
The main factors are the size of the home and how much cooling it needs, the type and efficiency of the equipment, the condition of the existing ductwork, any electrical work, where the outdoor unit and air handler will sit, and permit requirements. Those vary from house to house, so a firm number needs a visit to look at the home. We go through each factor and show how it changes the price.
Does replacing a furnace or air conditioner in Littleton require a permit?
The City of Littleton states that building permits are required to replace any electrical, gas, mechanical, or plumbing system, so a furnace or air conditioner replacement generally falls under a permit. A Littleton mailing address is not always inside city limits, and some homes follow county rules instead. Confirm which authority covers your address, and ask whoever quotes the job who will pull the permit.
Does Littleton’s elevation affect a gas furnace?
Yes. Littleton sits at roughly 5,400 feet, and the air is thinner than at sea level. Gas furnaces are generally rated at sea level, so manufacturers publish instructions for adjusting the burner at higher altitudes. Ask any installer, including us, how a new furnace will be set up for your elevation and have them confirm that it was done.
Why is my air conditioner leaking water or shutting off?
Cooling produces condensation, which drains away through a line and a pan. A clogged or disconnected drain line, a dirty filter, or a frozen coil can send water out, and many systems have a float switch that shuts the air conditioner off when the pan fills. Turn the system off, wipe up any standing water, and schedule service instead of running it again.
What does an air handler do, and when does it need repair?
The air handler is the indoor unit in a split system. It holds the blower and the cooling coil and pushes air through the ducts, and it may sit in an attic, closet, or basement. Weak airflow, ice on the coil, water around the unit, or a loud blower point to an air handler problem. It is designed to work with the outdoor unit, so ask whether replacing one means replacing both.
How often should I replace the filter in my air conditioner or furnace?
Check it monthly while the system is running hard, and replace it once it looks dirty. Many standard filters need changing every one to three months, and thicker media filters last longer. A clogged filter restricts airflow, which can lead to weak cooling, a frozen coil, or a furnace that shuts down. Follow the interval printed on the filter or in the equipment manual.
Schedule Heating and Cooling Service
Call 303-287-1846 or use request service online when the system has stopped, a tune-up is overdue, or you are pricing a replacement. Describe what the equipment is doing, and we will book a time for a technician to see it.